Electrochemical production of KNO/sub 3//NANO/sub 3/ salt mixture
A process for the electrolytic production of a chloride-free mixture consisting essentially of sodium and potassium nitrates is disclosed. In this process, an anolyte brine comprised of a mixture of sodium and potassium chlorides dissolved therein is electrolyzed in a membrane type electrolysis type cell to produce a mixed alkali metal hydroxide catholyte solution. The catholyte is reacted with nitric acid to form a mixed potassium-sodium nitrate solution. By properly adjusting the ratio of potassium chloride to sodium chloride concentration in the anolyte brine, a final nitrate product containing about from about 40% to about 80% NaNO/sub 3/ and from about 60% to about 20% KNO/sub 3/ by weight can be produced. The resulting product, after drying is suitable for use in many solar panel heat transfer applications.
- Assignee:
- Olin Corporation
- Patent Number(s):
- US 4465568
- OSTI ID:
- 6312940
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
141000 -- Solar Collectors & Concentrators
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400400* -- Electrochemistry
ALKALI METAL COMPOUNDS
BRINES
CHEMISTRY
CHLORIDES
CHLORINE COMPOUNDS
DISPERSIONS
DRYING
ELECTROCHEMISTRY
ELECTROLYSIS
EQUIPMENT
FLUIDS
HALIDES
HALOGEN COMPOUNDS
HEAT TRANSFER FLUIDS
HYDROGEN COMPOUNDS
INORGANIC ACIDS
LYSIS
MIXTURES
NITRATES
NITRIC ACID
NITROGEN COMPOUNDS
OXYGEN COMPOUNDS
POTASSIUM CHLORIDES
POTASSIUM COMPOUNDS
POTASSIUM NITRATES
SODIUM CHLORIDES
SODIUM COMPOUNDS
SODIUM NITRATES
SOLAR COLLECTORS
SOLAR EQUIPMENT